4-Dimethylaminobenzaldehyde
- CAS No.
- 100-10-7
- Chemical Name:
- 4-Dimethylaminobenzaldehyde
- Synonyms
- 4-(DIMETHYLAMINO)BENZALDEHYDE;P-DIMETHYLAMINOBENZALDEHYDE;DIMETHYLAMINOBENZALDEHYDE;p-DAB;para-Dimethylaminobenzaldehyde;4-Dimethylaminobenzaldehyde 、p-Dimethylaminobenzaldehyde;Ehrlichs;Benzaldehyde, 4-(dimethylamino)-;NSC 5517;D2004-100G
- CBNumber:
- CB4484990
- Molecular Formula:
- C9H11NO
- Molecular Weight:
- 149.19
- MDL Number:
- MFCD00003381
- MOL File:
- 100-10-7.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Melting point | 72-75 °C(lit.) |
|---|---|
| Boiling point | 176-177 °C (17 mmHg) |
| Density | 1.10 g/mL at 20 °C |
| bulk density | 350kg/m3 |
| vapor pressure | <0.1 hPa (20 °C) |
| refractive index |
n |
| Flash point | 164 °C |
| storage temp. | 2-8°C |
| solubility | alcohol: passes test (APHA ≤60) |
| pka | pK1:1.647(+1) (25°C) |
| form | Liquid |
| color | White to pale yellow |
| Odor | Characteristic odor |
| Water Solubility | 0.3 g/L (20 ºC) |
| Sensitive | Air Sensitive |
| λmax | 385 nm |
| Merck | 14,3230 |
| BRN | 606802 |
| Stability | Stable, but light sensitive. Incompatible with bases, strong oxidizing agents. |
| InChI | 1S/C9H11NO/c1-10(2)9-5-3-8(7-11)4-6-9/h3-7H,1-2H3 |
| InChIKey | BGNGWHSBYQYVRX-UHFFFAOYSA-N |
| SMILES | CN(C)c1ccc(C=O)cc1 |
| LogP | 1.810 |
| CAS DataBase Reference | 100-10-7(CAS DataBase Reference) |
| EWG's Food Scores | 1 |
| FDA UNII | V7E88PR1YB |
| NIST Chemistry Reference | Benzaldehyde, 4-(dimethylamino)-(100-10-7) |
| EPA Substance Registry System | Benzaldehyde, 4-(dimethylamino)- (100-10-7) |
| UNSPSC Code | 41171621 |
| NACRES | NA.85 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H317 | |||||||||
| Precautionary statements | P261-P272-P280-P302+P352-P333+P313-P362+P364 | |||||||||
| Hazard Codes | C,Xn,Xi,F | |||||||||
| Risk Statements | 36/37/38-52/53-22-67-41-37/38-10-66-37-34-20-20/21/22-36-11 | |||||||||
| Safety Statements | 7-16-24/25-26-61-45-39-36/37/39-36 | |||||||||
| RIDADR | UN 2920 8/PG 2 | |||||||||
| WGK Germany | 1 | |||||||||
| RTECS | CU5775000 | |||||||||
| F | 8 | |||||||||
| Autoignition Temperature | 445 °C | |||||||||
| TSCA | TSCA listed | |||||||||
| HazardClass | 3, 6.1,8 | |||||||||
| HS Code | 29223900 | |||||||||
| Storage Class | 11 - Combustible Solids | |||||||||
| Hazard Classifications | Skin Sens. 1B | |||||||||
| Toxicity | LD50 orally in Rabbit: > 6400 mg/kg | |||||||||
| REACH Registrations | Active | |||||||||
| Limited Quantities | 1.0 L (0.3 gallon) (liquid) | |||||||||
| Excepted Quantities | Max Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml) | |||||||||
| NFPA 704 |
|
4-Dimethylaminobenzaldehyde price More Price(138)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 8.03057 | 4-(Dimethylamino)benzaldehyde for synthesis | 100-10-7 | 100g | $77.5 | 2026-04-30 | Buy |
| Sigma-Aldrich | 8.03057 | 4-(Dimethylamino)benzaldehyde for synthesis | 100-10-7 | 250g | $171 | 2026-04-30 | Buy |
| Sigma-Aldrich | 8.03057 | 4-(Dimethylamino)benzaldehyde for synthesis | 100-10-7 | 1kg | $443 | 2026-04-30 | Buy |
| Sigma-Aldrich | 67309 | Kovac’s reagent for indoles formicrobiology | 100-10-7 | 100mL | $114 | 2026-04-30 | Buy |
| Sigma-Aldrich | 109762 | 4-(Dimethylamino)benzaldehyde 98% | 100-10-7 | 100g | $64.5 | 2026-04-30 | Buy |
4-Dimethylaminobenzaldehyde Chemical Properties, Uses, Production
Chemical Properties
4-Dimethylaminobenzaldehyde is white to off white crystalline powder
Uses
In the presence of oxygen, some bacteria, like E.coli, are able to split tryptophan into indole and alpha-aminopropionic acid. This reagent is for detecting the indole and identify the indole-positive and indole-negative microorganisms.
Uses
Forms colored condensation products (Schiff bases) with pyrroles1 and primary amines.2
Uses
In the presence of oxygen, some bacteria, like E. coli, are able to split tryptophan into indole and α-aminopropionic acid. This reagent is for detecting the indole and identifying the indole-positive and indole-negative microorganisms.
Uses
4-(Dimethylamino)benzaldehyde is used in Ehrlich's reagent for spectrophotometric determination of hydrazine as it reacts to form azo dyes. 4-(Dimethylamino)benzaldehyde is used for determination of u rine bilirubin and porphobilinogen.
Uses
Used as derivitizing agent.
Uses
4-Dimethylaminobenzaldehyde is used to prepare colorful Schiff base adducts with amines, pyrroles and indoles. It is often used in the Ehrlich reaction, test for the presence of indoles in a sample containing alkaloids and determination of hydrazine.
Definition
4-Dimethylaminobenzaldehyde is a mamber of the class of benzaldehydes carrying a dimethylamino substituent at position 4. Used as an indicator for detection of indoles and hydrazine.
Synthesis Reference(s)
Journal of Heterocyclic Chemistry, 26, p. 1563, 1989
Organic Syntheses, Coll. Vol. 4, p. 331, 1963
Tetrahedron Letters, 30, p. 287, 1989 DOI: 10.1016/S0040-4039(00)95181-5
General Description
Kovac′s reagent for indoles is a solution of 4-(dimethylamino)benzaldehyde and hydrochloric acid in n-butanol.
Biochem/physiol Actions
Kovac′s reagent detects the indole and aids in identifying the indole-positive and indole-negative microorganisms. E. coli can split tryptophan into indole and α-aminopropionic acid in the presence of the enzyme tryptophanase. p-Aminobenzaldehyde present in the reagent reacts with indole to form a cherry-red complex, that is soluble in alcohol, ether, and chloroform. It is recommended to use glucose free media and peptone with a high tryptophan content for the test.
Purification Methods
Crystallise DMAB from water, hexane, or from EtOH (2mL/g), after charcoal treatment, by adding excess of water. Alternatively dissolve it in aqueous acetic acid, filter, and precipitate it with ammonia. Finally recrystallise it from EtOH. It is used for the detection of pyrroles [Iyer et al. J Org Chem 59 6038 1994]. [Beilstein 14 IV 51.]
4-Dimethylaminobenzaldehyde Preparation Products And Raw materials
Raw materials
1of2
Preparation Products
1of3
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Taian Yingshun Chemical Co., Ltd. | 13854830608; 13854830608 | 13854830608@163.com | China | 2650 | 58 |
| Shanghai Aladdin Bio-Chem Technology Co.,LTD | 400-6206333 13167063860 | anhua.mao@aladdin-e.com | China | 29977 | 65 |
| Rhawn Reagent | 400-400-1332688 18019345275 | huyue@rhawn.cn | China | 14942 | 58 |
| Tai 'an Jiangzhou Biotechnology Co., LTD | 1385-13854830759 13854830759 | 3563349062@qq.com | China | 2328 | 58 |
| Wuhan Hongfuda New Materials Co., Ltd. | 19107255884 19107255884 | 259506217@qq.com | China | 2188 | 58 |
| 0 | 18769832557 18769832557 | 3948893484@QQ.com | China | 2977 | 58 |
| J & K SCIENTIFIC LTD. | 18210857532 18210857532 | jkinfo@jkchemical.com | China | 96815 | 76 |
| Meryer (Shanghai) Chemical Technology Co., Ltd. | 4006356688 18621169109 | market03@meryer.com | China | 40202 | 62 |
| INTATRADE GmbH | +49 3493/605464 | sales@intatrade.de | Germany | 3563 | 66 |
| Alfa Aesar | 400-6106006 | saleschina@alfa-asia.com | China | 30103 | 84 |
View Latest Price from 4-Dimethylaminobenzaldehyde manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-09-17 | 4-Dimethylaminobenzaldehyde
100-10-7
|
$2.00 | 1KG | ≥99% | 500mt/year | Jinan Finer Chemical Co., Ltd | |
 |
2026-09-02 | 4-Dimethylaminobenzaldehyde
100-10-7
|
$1.00-8.00 | 1KG | 99% | Henan Fengda Chemical Co., Ltd | ||
 |
2026-08-05 | 4-Dimethylaminobenzaldehyde
100-10-7
|
1kg | 98% | 1000 | Shaanxi Dideu New Materials Co. Ltd |
-
- 4-Dimethylaminobenzaldehyde
100-10-7
- $2.00
- ≥99%
- Jinan Finer Chemical Co., Ltd
-
- 4-Dimethylaminobenzaldehyde
100-10-7
- $1.00-8.00
- 99%
- Henan Fengda Chemical Co., Ltd
-
- 4-Dimethylaminobenzaldehyde
100-10-7
- $0.00
- 98%
- Shaanxi Dideu New Materials Co. Ltd
